diff --git a/Week04/decorators_aygul_ozkeklik.py b/Week04/decorators_aygul_ozkeklik.py
new file mode 100644
index 00000000..166622d2
--- /dev/null
+++ b/Week04/decorators_aygul_ozkeklik.py
@@ -0,0 +1,22 @@
+import time
+import sys
+import functools
+
+class Performance:
+    def __init__(self):
+        self.counter = 0
+        self.total_time = 0.0
+        self.total_mem = 0.0
+
+    def __call__(self, func):
+       def wrapper(*args, **kwargs):
+            start = time.time()
+            result = func(*args, **kwargs)
+            end = time.time()
+            self.counter += 1
+            self.total_time += (end - start)
+            self.total_mem += sys.getsizeof(result)
+            return result
+        return wrapper
+
+performance = Performance()